I read about the factory tour in China and it was a great read! And that's right, most of the YT videos show the layers to be very visible.. Right after I posted the topic, I somehow thought that if I was to make a 3D object, I would make the parts separately and hope that the joints fit.. have everything in white and just paint over them..
I just wonder if the plastic can be made as smooth as commercially made products. Anyways, it looks like the technology needs to be developed further..